Is this research centre _____ is full of modern equipment you always mention.
John waited at the bus-stop for nearly half an hour the bus finally arrived .
Not that I’m unwilling to lend you a hand ,I’m too busy for the moment .
Jack had traveled six miles across the Channel _____his engine failed and was forced to land on the sea .
—When did he leave the classroom? —He leftyou turned back to write on the blackboard.
he thought he was helping us with the work, he was actually in the way.